Valve facing device



Aug. 27, 1946'. sPRUNG 2,406,570

vALvE FACING DEVICE Filed Junej5, 1945 IN V EN TOR.

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Arrys Patented Aug. 27, 1946 UNITED STATES PATENT OFFICE I 2,406,570 i jVALVE FACING DEVICE Ralph D. Sprung, Rosemead, Calif. Application June5, 1945, Serial No. 597,639

The present invention relates to new and useful improvements in grindingmachines for facing or refinishing valves of internal combustion enginesand the like, and more particularly to a holder for the valve embodyingmeans for moving the valve toward and away from a grinding wheel, andalso for adjusting the valve to different angles relative to thegrinding wheel, to conform to the angle of the seating face of the valvewith the axis of the valve stem.

An important object of the present invention is to provide a valveholder of this character by means of which the valve may be rotatedduring its engagement with the grinding wheel.

Another object is to provide a device of this character of simple andpractical construction, which is efiicient and reliable in operation andrelatively inexpensive to manufacture, easy to install in operativeposition on a work bench in front of a conventional form of electricgrinder, and which otherwise is well adapted for the purposes for whichthe same is intended.

Other objects and advantages reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawing forming part hereof, wherein likenumerals refer to like parts throughout, and in which:

Figure 1 is a side elevational view with parts broken away and shown insection.

Figure 2 is a rear elevational view.

Figure 3 is a fragmentary sectional view taken substantially on a line3-3 of Figure 2.

Referring now to the drawing in detail, wherein for the purpose ofillustration I have disclosed a preferred embodiment of the invention,the numeral 5 designates an attaching plate for the valve holder securedto front and rear rails 6 by means of set screws I for lateraladjustment of the plate, the rails 6 being secured to a work bench orthe like 8 in a position adjacent a conventional form of motor-drivengrinding wheel (not shown). I j

The plate 5 is formed with a pair of longitudinally extending,spaced-apart guides 9 between which an upstanding base I is slidablymounted, the base 10 having laterally projecting flanges l I underlyingthe guides 9.

Rising from the base It! is a bolt 12 on which a U-shaped tool holder I3is mounted for rotation, the holder l3 being secured in adjustedposition by means of a wing nut I4 carried by the bolt.

A sleeve is slidably mounted in the legs of the holder I3, the sleevebeing closed at one end 1 Claim. (Cl. 51237 byv a disc l5 welded orotherwise secured thereto and welded or otherwise suitably secured tothedisc is a wheel ll having a handle l8 for rotating thesleeve in theholder.

To the other end of the sleeve I5 is secured a conventional form ofchuck l9 within'which a valve stem is secured, the valve stem having thehead 2! formed thereon, to be refaced by a motor-driven grinding wheel(not shown) also a mounted on the bench 8.

Threaded through the disc 16 is a screw "22 having an operating wheel 23secured at its rear end and having a head 24 at its front end formedwith a conical recess 25 adapted to receive the urge the sleeve l5forwardly away from the grinding wheel.

An adjusting screw 28 is threaded through the rear leg of the holder ISwith its rear end adapted to abut the disc H5 at the rear end of thesleeve, the adjusting screw having a knurled manipulating wheel 29 formoving the rear end of the screw 28 toward and away from the disc I6 tofunction as a stop for the forward movement of the sleeve and tomaintain the sleeve 15 rearwardly with the beveled edge of the valvehead 2| in engagement with the grinding wheel.

A leaf spring 30 attached to the rear leg of the holder l3 engages thewheel 29 of the adjusting screw to secure the latter in its adjustedposition.

The holder [3 and base ID are moved bodily toward and away from thegrinding wheel by means of a lever 3| pivoted to one of the guides 9 bymeans of a pin 32 and having a vertically extending slot 33 adjacent itspivoted end in which a in 34 carried by the base Ill is received, theholder thus being moved longitudinally in the guide 9 by themanipulation of the lever 3|.

To the upper portion of the base In is formed a dial plate 35 and to theunder side of the holder I3 is secured a plate 36 having a pointer orindicator 31 at one edge thereof cooperating with the markings 38 on thedial plate 35 whereby to indicate the angle of adjustment of the holderl3 on the base [0, so that the holder may be adjusted on the bolt l2 andat difierent angles in accordance with the angle of the valve head 2|.

In the operation of the device, the screw 22 and head 24 are adjustedlongitudinally in the sleeve I 5 by the wheel 23 in accordance withvariations in length of the valve stem 20 which is secured in the chuckI9 at the front end of the sleeve.

The sleeve I5 is then slidably adjusted in the holder I3 by theadjusting screw 28 to bring the seating face of the valve head 2| intoproper grinding relation with the grinding wheel.

As the seating face of the Valve head 2| is resurfaced'by the grindingwheel, the valve iszrotated by the handle l8'and wheel I"! attached tothe rear end of the sleeve for thus rotating the sleeve in the holder.

' The valve holder l3 and base l0 maybe moved I bodily by th'e lever 3|in the guides '9 to move the valve head 2| toward and away from thegrinding wheel. I

It is believed the details of construction; operation and advantages ofthe device will be readily understood from the foregoing without furtherdetailedeXplanation.

While I have illustrated and described a preferred construction forcarrying out my invention, it is apparent that various changes in construction and arrangement of the parts may be made without departingfrom the spirit of the invention.

:pivotally adjusted position on the base, a, sleeve slidably androtatably mounted in the support, means at one end of the sleeve forsecuring a valve stem therein, an adjusting screw extendinglongitudinally in the sleeve, a head at the inner-end of the screw"having a conical recess 7 adaptedto receive the inner end of the valvestem to center the valve stem in the sleeve,

spring means between the support and the sleevefor. urging thesleeveforwardly in the-support, an: adjusting screw between the sleeveand the support for'limiting forward movement of the sleeve; and'a handwheel at the rear end; ofthe sleeve fo-r'the manual rotation thereof.

'RALPHTJD. SPRUNG.

